Electric switch



E. .I. ROHNE. ELECTRIC swncn."

APPLICATION FILED OCT. 1. 191].

1,304,377. Patented May 20, 1919.

-BY I776 ATTOE/VE J EVEN J. ROHNE, or MINNEAPOLIS, mmnnso'rn.

ELECTRIC swrrcir;

To all whom it may concern:

Be it known that I, EVEN J. 30mm; a.

citizen of the United 'States, residing at.

Mlnneapolis, in the. county of Hennepin l and State of Minnesota, have invented certain new and useful Improvements in Electric Switchesand -I do hereby declare the following to be a full, clear, and exact\de-' scription ofthe invention,.such as will en-' I. able others skilled in the art to which it' appertains to make and use the same. My invention has for its object to provide i Specification of Letters Patent.

an extremely simple and highly eflicient.

electric switch of the cut-off. type;.and',j

ll toithis end, it consists of the nove devices and combinations of devices hereinafter described and defined inthe claims.

In the accompanying which illustrate the invention, like charactersfin- .0 dicate like parts throughout the several 1 views. 1 Referring to' the proved switch;

- taken on the'line 2-2 of Fig'l;

' Fi 3 is 'a View corresponding to with theexception thatthe switch is 111 an. open position; I

Fi 2 is 8. longitudinal central section line 4-4 of Fig. 3; and

Fig. 5 is a transverse section taken ionLthe.

line 55 of Fig. '3.

vexends 7 that are telescoped thereon. and

interlocked therewithvby bayonet joints '8.

v Patented may. 2o, 1919.

Application filed October 1,1917. Seria1 No.194, 170.

open or a switch closed position. *Formed the wide short end of the switch lever 14 .1s a pair of curved notches-16 axiallyspaced with respect to the shell'6.

A pair of grooves 17 substantially alined with the short end of the switch lever 14. are formed in the peripher extend from the ends hereof-into the re-i cess 13. Flat cooperating.- spring 'contact fingers 18 and. 19 are secured by binding 65 screws 20in the grooves 17 and projectint'o" the recess 13, the oneab ve the other, on opposite side's-ofthe pivot 15.; It will'be noted that the contact finger 18 is widened near its free end to' form. --a .'shouli ler 22 which engages anundercu't shoulderin'the opposite ed e of the switch lever 14 from. the fixed en of the contact finger 18.- This Fig. 4 is a transverse section taken onthe- A relatively long slot/9. is cut in the shell 6,. from one end thereof, and eachshell end 7 is provided with an axial cord opening Removably inserted-into the shell 6, by an axial sliding movement, is a core 11 that is covered by a thin tubing 12, said shell and tubing bein of suitable insulating material.

wise formed, a recess 13 to receive a dia- 'metrically extendedswitch lever 14 madev In onesi e of the core'll is cut, or othercontact finger 18 under strain to moveinto a switch open position, and carry the will presently appear.

The contact. finger 19 is under strain to move toward the contact'finger 1.8 with its free end yieldingly pressing upon the short 'end of the switch levef14so' as to enter.-v ,either one of the notches 16, with considere sable force,.and thereby yieldingly hold said I switch lever 14 in either a sw1tch. open-or ate-portion the contact finger 19 isbent gtoward the contact finger 18 to form a curved surface 21 with which the sharp end of said .contact finger 18v engages with a scraping 90 action. The formationof the surface 21 on the w contact finger 19 is such that from thetiihe the same is engagedby the shar end of the. contact finger18, until the swi ch lever 14 9 is locked in a switch closed position, alcon;

.stant, strong and clean contact between said .is comparatively wide and pivoted to the core 13 by a nut-equipped bolt for movement longitudinally thereof. The long. end

of the switch lever 14. projects through the slot 9 so that thesame may be easily oper 6 ated to move the same into either aswltch' spring contact fingers gers is insured. During. each movement of the contact finger 18,-the surface 21 of 100,

the contact-finger 19. is scraped by the sharp end of said contact. finger 18, and thereby automatically kept clean and bright. f" A By keeping the contact surfaces of the 1' contactfingers 18 and '19 clean sparks are 105 eliminated, 5 during the movement. of said' contact fingers to'and' .from a switch closed,

position, and a switchwith. .a quick snap.

action is -insured..- Inmp'roviding a pair of t at yielding y oppose one another when in switch close position, 10

co. y

of the core 11 and I i switch lever 14 therewith and its free end is made relatlvelysharp for a purpose that I Flgure 1 is an outside elevation ofthe im-j a switch closed positioni. At itsintermedrwear between the engaging surfaces thereof is'constantly taken up.

Electric. cords 24 are extended through the axial openings 10 in the shell ends 7 and directly connected to the contact fingers l8 and 19 by bindingscrews 20.

The above described electric switch is very compact, light and of comparatively small cost to manufacture and easy to assemble, with few parts to get outof order and has a very quick make and break action.

That I claim is:

1. An electric switch comprising a cylindrical metal casing having removable ends with axial cord openings, a recess insulating core completely filling the body of the easing, a pair'of contacts mounted in the recess of the core and attached thereto, a switch lever pivoted to the core for moving the contacts into switch open and switch vclosed positions, and electric cords extended through the cord openings in the ends of the casing and attached to the contacts.

2. An electric switch comprising a. cylindrical metal casing having removable ends with axial cord openings, a recess insulating core completely filling the body of the easing, a pair of contacts mounted in the recess of the core and attached thereto, a switch lever pivoted to the core for moving the contacts into switch open and switch closed positions and extending through a slot in one end of the casing, said core and switch lever being removable from the casing by an: axial movement of the core, and electric cords extended through the cord openings in the ends of the casing and attached to the contacts.

3. An electric switch, including two flat I spring contacts, the free ends of which are in overlapped relation, an intermediately pivoted switch lever having a pair of notches, one of said contacts adapted to be moved by said lever into engagement with the other thereof, and under strain to move into a switch open position and to carry the switch lever therewith, while the other of said contacts is arranged to alternately engage said two notches in the-switch lever and yieldingly hold the same in either a switch open or a switch closed position.

4L. An electric switch including two normally separated spring contacts, a switch lever having a shoulder adapted to engage one of said contacts and move the same into engagement with the other of said contacts,

said other contact arranged to yieldingly hold the lever in a switch closed position.

5. An electric switch including two normally separated spring contacts, a switch lever having a shoulder adapted to engage one of said contacts and move the same into engagement with the other of said contacts, said other contact arranged to yieldingly hold the lever in either a switch open or closed position.

6. An electric switch, including two normally separated spring'contacts extending, the one above the other, a switch lever piv oted between said two contacts and having a shoulder adapted to engage and move one of said contacts into engagement with the other of said contacts, said other contact arranged to yieldingly hold the lever in a switch closed positlon.

7. An electric switch including two nor mally separated spring contacts extending, the one above the other, one of said contacts having a raised intermediate portion with which the free end of the other of said contacts engages by a scraping action during the switch closing movement, and a switch lever adapted to move the last noted contact into the raised intermediate portion of said first noted contact and said last noted contact having its free end in engagement with the switch to yieldingly hold the same in a switch closed position.

8. An electric switch including two normally separated spring contacts extending, the one above the other, one of said contacts having a raised intermediate portion with which the free end of the other of said contacts engages by a scraping action 'during the switch closing movement, and a switch lever pivoted between said two contacts and having a shoulder and two lock notches, said shoulder arranged to engage the last noted contact during the'switch closing position of the lever and move the same into engagement with theraised intermediate portion of the first noted lever, the free end of said first noted lever arranged to alternately engage said lock notch and hold the lever in either of itsextreme positions. j

In testimony whereof. I afix my-signature in presence of two witnesses.

EVEN J. ROHN'E. Witnesses: v

CLARA DEMAREST, HARRY D. KILGORE. 

